/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/invert_string-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:47:52,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:47:52,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:47:52,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 18:47:52,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:47:52,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:47:52,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:47:52,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:47:52,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:47:52,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:47:52,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:47:52,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:47:52,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:47:52,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:47:52,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:47:52,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:47:52,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 18:47:52,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:47:52,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:47:52,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:47:52,959 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:47:52,972 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:47:52,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:47:52,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:47:52,975 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:47:52,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:47:52,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:47:52,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:47:52,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:47:52,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:47:52,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:47:52,976 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:47:52,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:47:52,977 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:47:52,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:47:52,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:47:52,978 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:47:52,978 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:47:52,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:47:52,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:47:52,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:47:52,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:47:52,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:47:52,980 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:47:53,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:47:53,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:47:53,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:47:53,449 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:47:53,454 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:47:53,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2021-02-23 18:47:53,565 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56fa4c747/19041631dc014251a989ed3b53f0313b/FLAGd89fdc10b [2021-02-23 18:47:54,248 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:47:54,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c [2021-02-23 18:47:54,258 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56fa4c747/19041631dc014251a989ed3b53f0313b/FLAGd89fdc10b [2021-02-23 18:47:54,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56fa4c747/19041631dc014251a989ed3b53f0313b [2021-02-23 18:47:54,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:47:54,661 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:47:54,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:47:54,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:47:54,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:47:54,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:47:54" (1/1) ... [2021-02-23 18:47:54,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36e09bf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:54, skipping insertion in model container [2021-02-23 18:47:54,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:47:54" (1/1) ... [2021-02-23 18:47:54,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:47:54,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:47:54,934 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c[352,365] [2021-02-23 18:47:54,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:47:54,979 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:47:54,996 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c[352,365] [2021-02-23 18:47:55,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:47:55,046 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:47:55,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:55 WrapperNode [2021-02-23 18:47:55,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:47:55,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:47:55,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:47:55,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:47:55,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:55" (1/1) ... [2021-02-23 18:47:55,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:55" (1/1) ... [2021-02-23 18:47:55,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:55" (1/1) ... [2021-02-23 18:47:55,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:55" (1/1) ... [2021-02-23 18:47:55,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:55" (1/1) ... [2021-02-23 18:47:55,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:55" (1/1) ... [2021-02-23 18:47:55,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:55" (1/1) ... [2021-02-23 18:47:55,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:47:55,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:47:55,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:47:55,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:47:55,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:47:55,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:47:55,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:47:55,267 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:47:55,267 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 18:47:55,267 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:47:55,267 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:47:55,267 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:47:55,268 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:47:55,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:47:55,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 18:47:55,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-23 18:47:55,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-23 18:47:55,269 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:47:55,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:47:55,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:47:55,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:47:55,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:47:55,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:47:55,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:47:55,747 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:47:55,748 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-23 18:47:55,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:47:55 BoogieIcfgContainer [2021-02-23 18:47:55,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:47:55,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:47:55,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:47:55,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:47:55,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:47:54" (1/3) ... [2021-02-23 18:47:55,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3546cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:47:55, skipping insertion in model container [2021-02-23 18:47:55,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:55" (2/3) ... [2021-02-23 18:47:55,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3546cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:47:55, skipping insertion in model container [2021-02-23 18:47:55,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:47:55" (3/3) ... [2021-02-23 18:47:55,759 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2021-02-23 18:47:55,766 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:47:55,774 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:47:55,794 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:47:55,821 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:47:55,821 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:47:55,821 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:47:55,821 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:47:55,821 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:47:55,822 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:47:55,822 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:47:55,822 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:47:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2021-02-23 18:47:55,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-23 18:47:55,850 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:47:55,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:47:55,852 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:47:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:47:55,859 INFO L82 PathProgramCache]: Analyzing trace with hash 56541078, now seen corresponding path program 1 times [2021-02-23 18:47:55,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:47:55,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421823177] [2021-02-23 18:47:55,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:47:55,956 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:47:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:56,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:56,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:56,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:56,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:56,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:47:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:56,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:56,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:47:56,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421823177] [2021-02-23 18:47:56,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:47:56,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 18:47:56,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094435001] [2021-02-23 18:47:56,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 18:47:56,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:47:56,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 18:47:56,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:47:56,220 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 3 states. [2021-02-23 18:47:56,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:47:56,498 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2021-02-23 18:47:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 18:47:56,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2021-02-23 18:47:56,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:47:56,513 INFO L225 Difference]: With dead ends: 127 [2021-02-23 18:47:56,513 INFO L226 Difference]: Without dead ends: 62 [2021-02-23 18:47:56,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:47:56,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-23 18:47:56,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-02-23 18:47:56,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-23 18:47:56,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2021-02-23 18:47:56,611 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 36 [2021-02-23 18:47:56,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:47:56,612 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2021-02-23 18:47:56,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 18:47:56,613 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2021-02-23 18:47:56,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-23 18:47:56,615 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:47:56,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:47:56,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:47:56,616 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:47:56,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:47:56,618 INFO L82 PathProgramCache]: Analyzing trace with hash -221059569, now seen corresponding path program 1 times [2021-02-23 18:47:56,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:47:56,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778603399] [2021-02-23 18:47:56,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:47:56,633 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:47:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:56,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:56,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:56,729 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:56,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:47:56,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:56,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:47:56,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:56,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:56,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:47:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:56,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:56,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:47:56,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778603399] [2021-02-23 18:47:56,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:47:56,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 18:47:56,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115500310] [2021-02-23 18:47:56,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 18:47:56,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:47:56,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 18:47:56,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:47:56,792 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 5 states. [2021-02-23 18:47:56,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:47:56,970 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-02-23 18:47:56,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 18:47:56,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2021-02-23 18:47:56,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:47:56,973 INFO L225 Difference]: With dead ends: 112 [2021-02-23 18:47:56,974 INFO L226 Difference]: Without dead ends: 79 [2021-02-23 18:47:56,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:47:56,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-23 18:47:56,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2021-02-23 18:47:56,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-23 18:47:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-02-23 18:47:56,999 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 36 [2021-02-23 18:47:56,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:47:56,999 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-02-23 18:47:56,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 18:47:56,999 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-02-23 18:47:57,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-23 18:47:57,001 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:47:57,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:47:57,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:47:57,002 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:47:57,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:47:57,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1628001064, now seen corresponding path program 1 times [2021-02-23 18:47:57,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:47:57,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035049999] [2021-02-23 18:47:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:47:57,029 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:47:57,031 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:47:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:57,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:57,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:57,128 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:57,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:47:57,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:57,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:47:57,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:57,139 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:57,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:47:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:57,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:57,196 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:47:57,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035049999] [2021-02-23 18:47:57,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:47:57,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 18:47:57,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984664142] [2021-02-23 18:47:57,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 18:47:57,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:47:57,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 18:47:57,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:47:57,205 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 5 states. [2021-02-23 18:47:57,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:47:57,461 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2021-02-23 18:47:57,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 18:47:57,462 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2021-02-23 18:47:57,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:47:57,464 INFO L225 Difference]: With dead ends: 100 [2021-02-23 18:47:57,465 INFO L226 Difference]: Without dead ends: 80 [2021-02-23 18:47:57,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-23 18:47:57,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-02-23 18:47:57,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2021-02-23 18:47:57,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-23 18:47:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-02-23 18:47:57,482 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 43 [2021-02-23 18:47:57,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:47:57,483 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-02-23 18:47:57,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 18:47:57,483 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-02-23 18:47:57,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-23 18:47:57,485 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:47:57,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:47:57,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:47:57,486 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:47:57,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:47:57,487 INFO L82 PathProgramCache]: Analyzing trace with hash -398128882, now seen corresponding path program 1 times [2021-02-23 18:47:57,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:47:57,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033862857] [2021-02-23 18:47:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:47:57,492 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:47:57,494 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:47:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:57,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:57,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:57,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:57,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:47:57,766 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:57,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 18:47:57,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:57,781 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 18:47:57,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:57,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:47:57,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:57,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:47:57,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:57,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:47:57,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:57,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:47:57,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:57,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:47:57,887 WARN L141 QuantifierPusher]: treesize reduction 28, result has 41.7 percent of original size [2021-02-23 18:47:57,888 WARN L147 QuantifierPusher]: treesize reduction 28, result has 41.7 percent of original size 20 [2021-02-23 18:47:57,911 WARN L141 QuantifierPusher]: treesize reduction 20, result has 72.2 percent of original size [2021-02-23 18:47:57,913 WARN L147 QuantifierPusher]: treesize reduction 20, result has 72.2 percent of original size 52 [2021-02-23 18:47:57,961 WARN L141 QuantifierPusher]: treesize reduction 21, result has 65.6 percent of original size [2021-02-23 18:47:57,962 WARN L147 QuantifierPusher]: treesize reduction 21, result has 65.6 percent of original size 40 [2021-02-23 18:47:58,012 WARN L141 QuantifierPusher]: treesize reduction 13, result has 68.3 percent of original size [2021-02-23 18:47:58,013 WARN L147 QuantifierPusher]: treesize reduction 13, result has 68.3 percent of original size 28 [2021-02-23 18:47:58,044 WARN L141 QuantifierPusher]: treesize reduction 25, result has 69.5 percent of original size [2021-02-23 18:47:58,048 WARN L147 QuantifierPusher]: treesize reduction 25, result has 69.5 percent of original size 57 [2021-02-23 18:47:58,092 WARN L141 QuantifierPusher]: treesize reduction 44, result has 60.7 percent of original size [2021-02-23 18:47:58,094 WARN L147 QuantifierPusher]: treesize reduction 44, result has 60.7 percent of original size 68 [2021-02-23 18:47:58,141 WARN L141 QuantifierPusher]: treesize reduction 21, result has 68.7 percent of original size [2021-02-23 18:47:58,143 WARN L147 QuantifierPusher]: treesize reduction 21, result has 68.7 percent of original size 46 [2021-02-23 18:47:58,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:58,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:47:58,194 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:58,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:47:58,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:58,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:47:58,226 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:58,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:58,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:47:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:58,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:58,282 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:47:58,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033862857] [2021-02-23 18:47:58,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:47:58,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-02-23 18:47:58,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288868714] [2021-02-23 18:47:58,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-23 18:47:58,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:47:58,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-23 18:47:58,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-02-23 18:47:58,316 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 20 states. [2021-02-23 18:47:59,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:47:59,704 INFO L93 Difference]: Finished difference Result 169 states and 178 transitions. [2021-02-23 18:47:59,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-23 18:47:59,704 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2021-02-23 18:47:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:47:59,712 INFO L225 Difference]: With dead ends: 169 [2021-02-23 18:47:59,713 INFO L226 Difference]: Without dead ends: 167 [2021-02-23 18:47:59,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=368, Invalid=1438, Unknown=0, NotChecked=0, Total=1806 [2021-02-23 18:47:59,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-02-23 18:47:59,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 95. [2021-02-23 18:47:59,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-02-23 18:47:59,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2021-02-23 18:47:59,741 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 53 [2021-02-23 18:47:59,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:47:59,741 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2021-02-23 18:47:59,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-23 18:47:59,741 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2021-02-23 18:47:59,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-23 18:47:59,744 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:47:59,744 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:47:59,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:47:59,744 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:47:59,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:47:59,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1012224277, now seen corresponding path program 2 times [2021-02-23 18:47:59,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:47:59,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305052947] [2021-02-23 18:47:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:47:59,753 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:47:59,754 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:47:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:59,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:59,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:59,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:59,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:47:59,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:59,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:47:59,856 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:59,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:47:59,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:59,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:47:59,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:59,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:47:59,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:59,872 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:47:59,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:59,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:47:59,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:59,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:59,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:47:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:59,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:59,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:47:59,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305052947] [2021-02-23 18:47:59,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:47:59,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 18:47:59,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535479420] [2021-02-23 18:47:59,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 18:47:59,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:47:59,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 18:47:59,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-23 18:47:59,949 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 9 states. [2021-02-23 18:48:00,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:00,388 INFO L93 Difference]: Finished difference Result 176 states and 185 transitions. [2021-02-23 18:48:00,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-23 18:48:00,389 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2021-02-23 18:48:00,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:00,392 INFO L225 Difference]: With dead ends: 176 [2021-02-23 18:48:00,393 INFO L226 Difference]: Without dead ends: 156 [2021-02-23 18:48:00,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-02-23 18:48:00,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-02-23 18:48:00,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 105. [2021-02-23 18:48:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-02-23 18:48:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-02-23 18:48:00,422 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 60 [2021-02-23 18:48:00,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:00,423 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-02-23 18:48:00,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 18:48:00,423 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-02-23 18:48:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-02-23 18:48:00,425 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:00,426 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:48:00,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 18:48:00,426 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:00,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:00,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1503336308, now seen corresponding path program 3 times [2021-02-23 18:48:00,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:00,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593620117] [2021-02-23 18:48:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:00,432 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:48:00,434 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:00,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:00,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:00,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:00,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:00,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:00,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:00,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:00,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:00,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:00,494 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:00,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:00,501 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:00,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:00,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:00,517 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:00,519 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:48:00,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:00,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:00,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:00,577 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:00,578 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:00,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593620117] [2021-02-23 18:48:00,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:00,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 18:48:00,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146624918] [2021-02-23 18:48:00,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 18:48:00,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:00,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 18:48:00,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-23 18:48:00,590 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 10 states. [2021-02-23 18:48:00,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:00,930 INFO L93 Difference]: Finished difference Result 170 states and 177 transitions. [2021-02-23 18:48:00,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-23 18:48:00,931 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2021-02-23 18:48:00,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:00,932 INFO L225 Difference]: With dead ends: 170 [2021-02-23 18:48:00,932 INFO L226 Difference]: Without dead ends: 140 [2021-02-23 18:48:00,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-02-23 18:48:00,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-02-23 18:48:00,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 105. [2021-02-23 18:48:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-02-23 18:48:00,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2021-02-23 18:48:00,958 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 63 [2021-02-23 18:48:00,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:00,959 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2021-02-23 18:48:00,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 18:48:00,959 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2021-02-23 18:48:00,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-02-23 18:48:00,961 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:00,961 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:48:00,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 18:48:00,961 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:00,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:00,962 INFO L82 PathProgramCache]: Analyzing trace with hash 600609810, now seen corresponding path program 1 times [2021-02-23 18:48:00,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:00,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123487157] [2021-02-23 18:48:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:00,967 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:48:00,968 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:01,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:01,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:01,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,019 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:01,023 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:01,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:01,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:01,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:48:01,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,057 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:01,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:01,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:01,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:01,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-02-23 18:48:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:01,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:01,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123487157] [2021-02-23 18:48:01,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:01,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 18:48:01,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963974638] [2021-02-23 18:48:01,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 18:48:01,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:01,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 18:48:01,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-23 18:48:01,121 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 10 states. [2021-02-23 18:48:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:01,459 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2021-02-23 18:48:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-23 18:48:01,460 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2021-02-23 18:48:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:01,461 INFO L225 Difference]: With dead ends: 148 [2021-02-23 18:48:01,461 INFO L226 Difference]: Without dead ends: 97 [2021-02-23 18:48:01,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-02-23 18:48:01,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-02-23 18:48:01,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 81. [2021-02-23 18:48:01,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-02-23 18:48:01,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2021-02-23 18:48:01,480 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 69 [2021-02-23 18:48:01,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:01,480 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2021-02-23 18:48:01,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 18:48:01,481 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2021-02-23 18:48:01,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-02-23 18:48:01,482 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:01,482 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:48:01,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 18:48:01,482 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:01,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:01,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1043481275, now seen corresponding path program 4 times [2021-02-23 18:48:01,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:01,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842133727] [2021-02-23 18:48:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:01,491 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:48:01,492 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:01,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:01,590 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,591 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:48:01,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,598 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 18:48:01,608 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 18:48:01,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 18:48:01,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:48:01,659 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:48:01,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:48:01,713 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,714 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:48:01,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:48:01,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-23 18:48:01,789 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:01,790 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-23 18:48:01,818 WARN L141 QuantifierPusher]: treesize reduction 26, result has 60.6 percent of original size [2021-02-23 18:48:01,820 WARN L147 QuantifierPusher]: treesize reduction 26, result has 60.6 percent of original size 40 [2021-02-23 18:48:01,878 WARN L141 QuantifierPusher]: treesize reduction 17, result has 76.7 percent of original size [2021-02-23 18:48:01,880 WARN L147 QuantifierPusher]: treesize reduction 17, result has 76.7 percent of original size 56 [2021-02-23 18:48:01,949 WARN L141 QuantifierPusher]: treesize reduction 17, result has 78.5 percent of original size [2021-02-23 18:48:01,951 WARN L147 QuantifierPusher]: treesize reduction 17, result has 78.5 percent of original size 62 [2021-02-23 18:48:02,026 WARN L141 QuantifierPusher]: treesize reduction 13, result has 68.3 percent of original size [2021-02-23 18:48:02,027 WARN L147 QuantifierPusher]: treesize reduction 13, result has 68.3 percent of original size 28 [2021-02-23 18:48:02,067 WARN L141 QuantifierPusher]: treesize reduction 25, result has 69.1 percent of original size [2021-02-23 18:48:02,069 WARN L147 QuantifierPusher]: treesize reduction 25, result has 69.1 percent of original size 56 [2021-02-23 18:48:02,135 WARN L141 QuantifierPusher]: treesize reduction 44, result has 60.4 percent of original size [2021-02-23 18:48:02,137 WARN L147 QuantifierPusher]: treesize reduction 44, result has 60.4 percent of original size 67 [2021-02-23 18:48:02,235 WARN L141 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-02-23 18:48:02,237 WARN L147 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size 45 [2021-02-23 18:48:02,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:02,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:02,304 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:02,305 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:02,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:02,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:02,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:02,339 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:02,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:02,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:02,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:02,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842133727] [2021-02-23 18:48:02,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:02,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-02-23 18:48:02,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100377667] [2021-02-23 18:48:02,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-23 18:48:02,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:02,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-23 18:48:02,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-02-23 18:48:02,433 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 24 states. [2021-02-23 18:48:04,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:04,513 INFO L93 Difference]: Finished difference Result 196 states and 205 transitions. [2021-02-23 18:48:04,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-23 18:48:04,514 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2021-02-23 18:48:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:04,516 INFO L225 Difference]: With dead ends: 196 [2021-02-23 18:48:04,516 INFO L226 Difference]: Without dead ends: 194 [2021-02-23 18:48:04,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=512, Invalid=2794, Unknown=0, NotChecked=0, Total=3306 [2021-02-23 18:48:04,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-02-23 18:48:04,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 122. [2021-02-23 18:48:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-02-23 18:48:04,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2021-02-23 18:48:04,545 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 70 [2021-02-23 18:48:04,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:04,545 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2021-02-23 18:48:04,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-02-23 18:48:04,546 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2021-02-23 18:48:04,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-02-23 18:48:04,547 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:04,548 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:48:04,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 18:48:04,548 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:04,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:04,549 INFO L82 PathProgramCache]: Analyzing trace with hash -206034540, now seen corresponding path program 5 times [2021-02-23 18:48:04,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:04,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783843292] [2021-02-23 18:48:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:04,556 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:48:04,557 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:04,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:04,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,598 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:04,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,598 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:04,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,602 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:04,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:04,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:04,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:04,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:04,634 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,635 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:04,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,636 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:04,644 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:04,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:04,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:04,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:04,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:04,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:04,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:04,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783843292] [2021-02-23 18:48:04,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:04,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-23 18:48:04,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175957623] [2021-02-23 18:48:04,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 18:48:04,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:04,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 18:48:04,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-02-23 18:48:04,720 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 12 states. [2021-02-23 18:48:05,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:05,295 INFO L93 Difference]: Finished difference Result 198 states and 207 transitions. [2021-02-23 18:48:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-23 18:48:05,296 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2021-02-23 18:48:05,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:05,298 INFO L225 Difference]: With dead ends: 198 [2021-02-23 18:48:05,298 INFO L226 Difference]: Without dead ends: 178 [2021-02-23 18:48:05,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-02-23 18:48:05,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-02-23 18:48:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2021-02-23 18:48:05,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-02-23 18:48:05,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2021-02-23 18:48:05,325 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 77 [2021-02-23 18:48:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:05,326 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2021-02-23 18:48:05,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 18:48:05,326 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2021-02-23 18:48:05,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-02-23 18:48:05,327 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:05,328 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:48:05,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 18:48:05,328 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:05,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:05,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1973542113, now seen corresponding path program 6 times [2021-02-23 18:48:05,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:05,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177067428] [2021-02-23 18:48:05,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:05,336 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:48:05,337 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:05,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:05,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:05,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:05,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:05,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,386 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:05,392 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:05,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:05,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:05,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:05,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:05,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:05,434 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,435 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:48:05,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:05,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:05,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:05,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177067428] [2021-02-23 18:48:05,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:05,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-23 18:48:05,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193480269] [2021-02-23 18:48:05,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-23 18:48:05,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:05,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-23 18:48:05,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-02-23 18:48:05,488 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 13 states. [2021-02-23 18:48:05,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:05,933 INFO L93 Difference]: Finished difference Result 197 states and 204 transitions. [2021-02-23 18:48:05,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-23 18:48:05,933 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2021-02-23 18:48:05,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:05,935 INFO L225 Difference]: With dead ends: 197 [2021-02-23 18:48:05,935 INFO L226 Difference]: Without dead ends: 167 [2021-02-23 18:48:05,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-02-23 18:48:05,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-02-23 18:48:05,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 132. [2021-02-23 18:48:05,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-02-23 18:48:05,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2021-02-23 18:48:05,961 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 80 [2021-02-23 18:48:05,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:05,961 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2021-02-23 18:48:05,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-23 18:48:05,961 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2021-02-23 18:48:05,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-02-23 18:48:05,962 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:05,963 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:48:05,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 18:48:05,963 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:05,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:05,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1425200063, now seen corresponding path program 2 times [2021-02-23 18:48:05,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:05,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883709336] [2021-02-23 18:48:05,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:05,972 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:48:05,973 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:48:05,997 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:48:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:48:06,019 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:48:06,055 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 18:48:06,056 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 18:48:06,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 18:48:06,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:48:06 BoogieIcfgContainer [2021-02-23 18:48:06,076 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:48:06,077 INFO L168 Benchmark]: Toolchain (without parser) took 11430.13 ms. Allocated memory was 153.1 MB in the beginning and 267.4 MB in the end (delta: 114.3 MB). Free memory was 128.9 MB in the beginning and 202.8 MB in the end (delta: -73.9 MB). Peak memory consumption was 40.9 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:06,077 INFO L168 Benchmark]: CDTParser took 1.20 ms. Allocated memory is still 125.8 MB. Free memory is still 82.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:48:06,078 INFO L168 Benchmark]: CACSL2BoogieTranslator took 381.84 ms. Allocated memory is still 153.1 MB. Free memory was 127.7 MB in the beginning and 118.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:06,078 INFO L168 Benchmark]: Boogie Preprocessor took 72.89 ms. Allocated memory is still 153.1 MB. Free memory was 117.9 MB in the beginning and 116.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:06,079 INFO L168 Benchmark]: RCFGBuilder took 627.29 ms. Allocated memory is still 153.1 MB. Free memory was 116.3 MB in the beginning and 123.2 MB in the end (delta: -6.9 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:06,079 INFO L168 Benchmark]: TraceAbstraction took 10324.34 ms. Allocated memory was 153.1 MB in the beginning and 267.4 MB in the end (delta: 114.3 MB). Free memory was 122.8 MB in the beginning and 202.8 MB in the end (delta: -79.9 MB). Peak memory consumption was 34.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:06,081 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.20 ms. Allocated memory is still 125.8 MB. Free memory is still 82.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 381.84 ms. Allocated memory is still 153.1 MB. Free memory was 127.7 MB in the beginning and 118.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 72.89 ms. Allocated memory is still 153.1 MB. Free memory was 117.9 MB in the beginning and 116.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 627.29 ms. Allocated memory is still 153.1 MB. Free memory was 116.3 MB in the beginning and 123.2 MB in the end (delta: -6.9 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10324.34 ms. Allocated memory was 153.1 MB in the beginning and 267.4 MB in the end (delta: 114.3 MB). Free memory was 122.8 MB in the beginning and 202.8 MB in the end (delta: -79.9 MB). Peak memory consumption was 34.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int MAX = __VERIFIER_nondet_uint(); [L17] COND FALSE !(!(MAX > 0)) [L18] char str1[MAX], str2[MAX]; [L19] int cont, i, j; [L20] cont = 0 [L22] i=0 [L22] COND TRUE i= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ [L29] i-- [L29] COND TRUE i >= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ [L29] i-- [L29] COND FALSE !(i >= 0) [L34] j = MAX-1 [L35] i=0 [L35] COND TRUE i